There is an example of this in the eclipse code for 3.6. Any recent build of Eclipse 3.6 should have the Network Error Page which is supplied by a Content Producer in the org.eclipse.help.webapp plugin, see /org.eclipse.help.webapp/src/org/eclipse/help/internal/webap p/StatusProducer.java

In order to reference the Content Producer, you need to use a URL that includes the plugin which contains the extension point for your Content Producer. In other words, for the example above , something like this:

help/topic/org.eclipse.help.webapp/NetworkHelpStatus.html

The getInputStream(String pluginID, String href, Locale locale) method of your Content Producer will be called anytime a reference is made to a topic inside of its parent plugin. At that time, it is best to check the request and see if it is a request for your dynamic content. If so, return an InputStream containing the dynamic content. If not, return null so that Eclipse can send the help request to any static content that may be available in the plugin.